Optical illusion produced in stereoscopic imaging. 2 identical, parallel lines are viewed with 1 eye; 3rd equal parallel line is viewed with other eye; and single line is then moved to overlap 1 of 1st 2 lines. Combined line appears closer.
InsideSurgery Medical Information Blog
Details of surgical procedures, pathophysiology, signs and symptoms, and treatment of medical diseases,medical and surgical eponyms, and surgeons and surgery in the news